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A. D. CLARKE. IE'ILTERING TABLE FOR 0111: OONOENTRATORS. No. 323,791.

Patented Aug. 4,1885.

meo'u'ew: I '52 V67: [0 7? .fizxwawzer 2 Chile Q V/QQM NITED STATES ALEXANDER D. CLARKE, OF NEWV YORK, N. Y.

FILTERING- TABLE FOR ORE-CONCENTRATQRS.

SPECIFICATION forming part of Letters Patent No. 323,791, dated August 4, 1885.

Application filed November 10, 1884.

To all whom it may concern:

Be it known that I, ALEXANDER D. CLARKE, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented a new and useful Improvement in Filtering-Tables for Ore-- Concentrators, of which the following is a specification.

This invention is designed to permit the recovery of the gold from the filtering-blankets or other filters used in ore-concentrators without removing the filters from the machine for that purpose. The object is accomplished by the construction and mode of operation detailed below.

In the accompanying vdrawings,whieh form a part of this specification, Figure 1 is a plan view of a portion of an ore-concentrator embodying my present invention. Fig. 2 is a longitudinal vertical section of the same parts.

In said drawings, H represents a tank such as has been used before, wherein the commingled water and sand or gravel are received, and from which they flow over filters laid upon the inclined tables L. Two or more of these tables, separated by partitions L, are employed with the present invention.

The filter-blankets w,when in use, are spread upon the filter-frames XV, being supported thereon by the wire-cloth W. This filterframe does not extend the full length of tables L, but is supplemented at the end next to the tank H by platform W, there being channels W" between the platform and frames and the tables,whereby the water filtering through the filters may pass off into tank D at the foot of the tables, and these channels are closed at the tank H, preferably by removable strips The partition L is furnished with a vertically-hinged portion, L", over theplatform W, which is capable of being swung over toward either table.

hen it is desired to clean the filter on the No model.)

upper table of Fig. 1, the hinged part L is moved to the dotted position, and thereby it acts as a gate to shut off the water from said tire current from tank H is conducted to the U other table, the filter upon which may be cleaned in like manner by swinging the part L to the other side from that indicated.

Obviously, if the platform \V be thought unnecessary, the strip W may belocated at the point where the filter-frame commences, and the gate L in that case would only require to be made deep enough to extend to the fioor or surface of the table L.

By the use of my invention it is possible to clean the filter upon any tableinthe apparatus without interfering with or stopping the operation of the rest of them.

I claim- 1.. The combination, with the tables L and the platforms and filters thereon, of the vertically-hinged gate L and strips W shutting off the water from the tables and from the passages between the tables and filters, substantially as specified.

2. The combination, in an ore-concentrator, with tables L and the filters thereon, having the discharge-channels W formed between them, of tank H and a gate for shutting off the water from the tables while the filters are being cleaned, substantially as set forth.

ALEXANDER D. CLARKE.

Witnesses:

Crmunns E. Tnn'rs, N. S. RAUS. 

